.login_bg{
    height: 100%;
    /* background:linear-gradient(to bottom, skyblue, #fff); */
}
.login_container{
    width: 1000px;
    height:800px ;
    background: #fff;
    margin: 100px auto;
}
.login_form{
    position: relative;
    top: 100px;
    text-align: center;
    margin: 0 auto;
    height: 400px;
    width: 600px;
    /* background-color:rgba(103,105,113,0.6); */
    border: 1px solid #bbb;
    box-shadow:4px 5px 6px 7px rgba(0,0,0,.5);
    opacity: 0.8;
    border-radius: 10px;
}
.login_form h2{
    margin: 20px auto;
    font-size: 30px;
    font-weight: bold;
    border-bottom: 1px solid #eee;
}